Triangulation applied to sheet metal pattern cutting : a comprehensive treatise for cutters, draftsmen, foremen and students ... (1920)
Kidder, F. S. (Fred SMith), b. 1863 · New York : The Sheet Metal Publication Company · leaf 13
r, the magnitude of the variation is so small, that it may consistently be considered as a negligible quantity. To Draw a Triangle. As an aid in securing a clear conception of the most elementary principles involved, we may for the moment presume that we have given us three, four and five inches as… … Fig. 2. Illustrating a method of drawing a Fig. 1. Illustrating a parallelogram when the method of drawing a tri- length of its diagonal is angle to given dimen- sions. known. With compasses set to a span of four inches, place one point at a, and describe the arc c d. Since the length of one side…
Sheet-metal work
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
